I know, I know. how old is IE 11? But it's our corporate standard for the time being, as I'm sure it's other people's. I'd be shocked if this hasn't been a problem for other folks--any suggestions? Clearly I could just edit the script, but that doesn't sound sustainable to me.

Thanks very much for the reply, and that community post was indeed helpful. I was able to find some good troubleshooting tips that reminded me of an issue I had forgotten about: Compatibility Mode. In fact, there are two issues at work here which I have little control over.

Our SharePoint instance is running HTTPS, while our Tableau instance is not. This makes importing scripts a policy exception, and hinky at best. It's on our roadmap to put Tableau on HTTPS, but it hasn't happened yet.

By policy, IE11 runs in "Compatibility Mode" for intranet services, which I believe effects the Javascript interpreter.

Very annoying.

So I believe I'm going to let this one sit until problem #1 gets resolved, and then see if there's anything I can do about problem #2.